ASoC: wcd_cpe_core: Add LAB IPC commands for listen

LAB feature is used in listen to capture PCM data
once the keyword is detected. This change is used
for sending the IPC commands to CDSP to control LAB
feature. Platform driver will be able to start
and stop lab with the commands sent from CPE core.

Change-Id: I734a559f5cf4654a3ddeb8b658a9aad549a8bb04
Signed-off-by: Venkat Sudhir <vsudhir@codeaurora.org>
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>